Acoustic phenomena observed on rocket-borne high altitude explosions: William Nordberg
National Aeronautics and Space Administration, 1962 - Science - 10 pages
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18 at microphone absorption and refraction ACOUSTIC PHENOMENA OBSERVED acoustic wave amplitude increase amplitude with altitude Bandeen Bartman Brode Reference Brode's theory Canada TEMPERATURE Churchill developed by Brode dimensionless quantity Doppler shift due DOVAP antennas explained by conventional exploding grenade EXPLOSIONS by William fired during recent frequency GRENADE EXPLOSION Guam HIGH ALTITUDE EXPLOSIONS high-explosive charges instrumented with high-explosive Mach numbers Mc/sec meters negative temperature gradient Nordberg Goddard Space November 12 number of interest observed by studying OBSERVED ON ROCKET-BORNE observing the shock Ottermann phenomena not directly phenomenon conforms point source received from grenades refraction treatments rocket SM ROCKET-BORNE HIGH ALTITUDE Rocket-Grenade Experiment rockets instrumented series of rockets shock front shock propagation shock wave signal slowed to Mach sound amplitudes received sound waves detected SOURCE BRODE Spherical Charge strong negative temperature Temperatures and sound Temperatures and Winds theories on shock trajectory Transmission Loss U. S. Army velocity William Nordberg Goddard